[Leica] Help? Lightroom refusing to import

[Brian Reid]

We hired a professional to photograph my mother's funeral service.
We paid him very well, and got ownership rights of the images. He 
delivered about 100 images.

Lightroom refuses to import them. It just sits there.
I made a new test catalog, and tried importing one image. Same thing. It 
hangs.
Photoshop will open them.
Topaz will open them.
Apple Preview will open them.
Bridge will open and manipulate them.
Apple's "Photos" app will import them.
Lightroom refuses to touch them.

Is there some kind of a Digital Rights Management flag you can put on an 
image file that will make it impossible to load into Lightroom?

Lightroom Classic 13.0.1 Release.

I have searched carefully, in Bridge, for metadata that might express an 
opinion to Lightroom, but haven't found anything.

Does anybody know what might be going on?